class_docstr: Manages a list of languages.
class_docstr_tok: ["Manages","a","list","of","languages","."]
docstr: Add a language to the set.
docstr_tok: ["Add","a","language","to","the","set","."]
code: def __call__(self, parser, namespace, values, option_string=None):
      """Add a language to the set."""
      dest = getattr(namespace, self.dest)
      if "+" in values:
          [dest.append(lang) for lang in values.split("+")]
      else:
          dest.append(values)
  
file_path: OCRmyPDF/src/ocrmypdf/cli.py
imports: from __future__ import annotations
  import argparse
  from collections.abc import Mapping
  from typing import Any, Callable, TypeVar
  from ocrmypdf._version import PROGRAM_NAME
  from ocrmypdf._version import __version__
label_desc: Use image node_id 2 for calling the LanguageSetAction obj's underlying member method code with example usage: obj.__call__(parser, namespace, values, option_string) without return types